Ingredient review
PEG-5 Stearamine
INCI: PEG-5 Stearamine
PEG-5 Stearamine is a synthetic emulsifier that helps blend oil and water, but may cause irritation or clog pores for some skin types.
In plain English
PEG-5 Stearamine is a man-made ingredient that helps mix oil and water in products like conditioners and moisturizers. It also makes hair feel softer and reduces static. However, because it is a type of amine (a nitrogen-based compound), it can sometimes irritate sensitive skin or contribute to clogged pores, especially in leave-on products.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is moderate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
PEG-5 Stearamine can be useful, but watch for some irritation potential and possible clogging concerns.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging PEG-5 Stearamine.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
Clogging risk
moderateMay be fine for many users but deserves caution if you are breakout-prone.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
PEG-5 Stearamine is a polyethylene glycol (PEG) derivative of stearamine, a fatty amine. It acts as a surfactant and emulsifier, reducing surface tension between oil and water phases in a formula.
How it works
In a cosmetic product, PEG-5 Stearamine positions itself at the interface of oil and water droplets, allowing them to mix into a stable emulsion. It also carries a positive charge, which helps it bind to negatively charged hair and skin surfaces, providing conditioning and anti-static effects.
Pros
Effective emulsifier
Helps oil and water mix smoothly, giving creams and conditioners a stable, uniform texture.
Good hair conditioner
Reduces frizz and static, leaving hair softer and easier to comb through.
Cons and cautions
Potential irritant
As an amine, it can cause stinging or redness on sensitive or compromised skin, especially in leave-on products.
May clog pores
Has a moderate comedogenic rating, meaning it could contribute to breakouts for acne-prone individuals.
Best for
- People with dry or normal hair looking for conditioning
- Those using rinse-off products like conditioners
Use caution if
- Individuals with acne-prone or very sensitive skin
- Those who prefer completely natural or plant-based ingredients
Usage tips
Safety summary
PEG-5 Stearamine is considered safe for use in cosmetics at typical concentrations, but it can be irritating to sensitive skin and may clog pores. The Cosmetic Ingredient Review (CIR) panel has evaluated similar PEG amines and found them safe when formulated to be non-irritating.
Research notes
Limited direct studies on PEG-5 Stearamine, but related PEG amines have been reviewed by the CIR panel. They concluded these ingredients are safe for use in rinse-off and leave-on products at concentrations up to 5%, with caution for irritation.
Common label clues
- Typical concentration
- Typically 0.5% to 5% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions, subject to concentration limits and purity requirements.
- Common uses
- Conditioners, Hair rinses, Leave-in treatments, Moisturizers
- Environmental note
- PEG compounds are generally biodegradable, but their production involves ethylene oxide, which is a hazardous chemical. Environmental impact depends on manufacturing practices.
Good to know
- PEG-5 Stearamine is often found in combination with other conditioning agents in hair care.
- The '5' in its name indicates the average number of ethylene oxide units in the PEG chain.
Common questions
What is PEG-5 Stearamine in beauty products?
PEG-5 Stearamine is a man-made ingredient that helps mix oil and water in products like conditioners and moisturizers. It also makes hair feel softer and reduces static. However, because it is a type of amine (a nitrogen-based compound), it can sometimes irritate sensitive skin or contribute to clogged pores, especially in leave-on products.
What does PEG-5 Stearamine do in a beauty product?
In a cosmetic product, PEG-5 Stearamine positions itself at the interface of oil and water droplets, allowing them to mix into a stable emulsion. It also carries a positive charge, which helps it bind to negatively charged hair and skin surfaces, providing conditioning and anti-static effects.
Is PEG-5 Stearamine safe for most people?
PEG-5 Stearamine is considered safe for use in cosmetics at typical concentrations, but it can be irritating to sensitive skin and may clog pores. The Cosmetic Ingredient Review (CIR) panel has evaluated similar PEG amines and found them safe when formulated to be non-irritating.
Who should be careful with PEG-5 Stearamine?
Individuals with acne-prone or very sensitive skin Those who prefer completely natural or plant-based ingredients
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.